-82.63% is the change from 639 to 111
Calculation steps:
[( 111 - 639 ) ÷ 639] x 100 = -82.63%
Formula
Percentage change = [(111 - 639) / 639] x 100
Subtract the new number by the original number
111 - 639 = -528
-528 ÷ 639 = -0.8262910798122066
-0.8262910798122066 x 100 = -82.63%